Finding the Fourth Proportional to 76,142.94, 105,077.45 and 42,152.40

Step by Step Solution

1. Step 1: Write the proportion equation
   76,142.94 : 105,077.45 = 42,152.40 : x
2. Step 2: Convert to fraction form
   76,142.94/105,077.45 = 42,152.40/x
3. Step 3: Cross multiply
   76,142.94x = 105,077.45 × 42,152.40
4. Step 4: Simplify right side
   76,142.94x = 4,429,266,808.76
5. Step 5: Solve for x
   x = 4,429,266,808.76/76,142.94
6. Step 6: Final answer
   x = 58,170.42